CN211472450U - Device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state - Google Patents
Device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state Download PDFInfo
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- CN211472450U CN211472450U CN201922294983.5U CN201922294983U CN211472450U CN 211472450 U CN211472450 U CN 211472450U CN 201922294983 U CN201922294983 U CN 201922294983U CN 211472450 U CN211472450 U CN 211472450U
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Abstract
The utility model discloses a device for measuring horizontal permeability coefficient under the indoor simulated vacuum prepressing state, which comprises a soil sample barrel, a vacuum box and a vacuum pump; the soil sample barrel comprises a bottom plate seat, a ring-type water tank fixed on the upper surface of the bottom plate seat and a hole-type barrel fixed inside the ring-type water tank, wherein a movable baffle is arranged between the ring-type water tank and the hole-type barrel; the hole type barrel is internally provided with a drainage plate, and the top end of the drainage plate is connected with the vacuum box through a hose. When vacuum prepressing is carried out, the movable baffle is embedded into the base of the soil sample box, sealing is carried out, the movable baffle is watertight, after consolidation is finished, the movable baffle is lifted, and water in the ring-type water tank enters the soil sample in the hole-type barrel; the method not only can ensure the completion of vacuum preloading and control the negative pressure state of the soil body, but also can calculate the horizontal permeability coefficient of the soil sample in real time through the reduction of the water level of the ring-type water tank. The utility model discloses the device is simple reasonable, and is easy and simple to handle, accords with the experimental needs of geotechnical engineering now, and the practicality is strong.
Description
Technical Field
The utility model relates to a soft soil foundation osmotic coefficient field of measurationing especially relates to an indoor simulation vacuum preloading state is down measured horizontal osmotic coefficient's device.
Background
In recent years, the economic development of most cities in coastal areas of China is accelerated, a large number of industries such as civil buildings, wharfs and airports are built, a plurality of dredger fill lands are formed by sea filling and land building in the early stage of building, and under the control of construction cost and time, vacuum preloading is the most economic foundation treatment mode for treating dredger fill foundations in the prior art.
The dredger fill is consolidated in a vacuum preloading mode, the consolidation is the result of soil body drainage and foundation strength increase, drainage is realized by arranging a sand well or a plastic drainage plate to be inserted into the soil body, and the largest factor influencing drainage consolidation is the horizontal permeability coefficient of the soil body. However, although the existing geotechnical test instruments can basically measure the vertical permeability coefficient, the existing geotechnical test instruments have difficulty in measuring the horizontal permeability coefficient. Therefore, it is an urgent technical problem to provide a device capable of measuring the permeability coefficient of the consolidation level of the dredger fill.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an indoor simulation weak soil is at the device of the horizontal permeability coefficient of measurationing under the vacuum pre-compaction state, can measuratione the horizontal permeability coefficient of the soil body under any negative pressure state.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a device for measuring horizontal permeability coefficient under the indoor simulated vacuum prepressing state, which comprises a soil sample barrel, a vacuum box and a vacuum pump connected with the vacuum box; the soil sample barrel comprises a bottom plate seat, a ring-type water tank fixed on the upper surface of the bottom plate seat and a hole-type barrel fixed inside the ring-type water tank, wherein a plurality of round holes are formed in the side wall of the hole-type barrel, soil samples are filled in the hole-type barrel, a movable baffle is arranged between the ring-type water tank and the hole-type barrel, when the bottom of the movable baffle is connected with the bottom plate seat, water in the ring-type water tank cannot enter the hole-type barrel, the movable baffle is lifted until the bottom of the movable baffle is separated from the bottom plate seat, and the water in the ring-type water tank can enter the hole-type barrel through the round holes; and a drainage plate is arranged in the hole type barrel, and the top end of the drainage plate is connected with the vacuum box through a hose.
Optionally, a vacuum gauge is arranged at the top of the hole-type barrel.
Optionally, the ring-type water tank is a transparent organic glass water tank, and scales are carved on the surface of the ring-type water tank.
Optionally, the volume of the ring-type water tank is at least twice the volume of the hole-type barrel.
Optionally, a groove used for embedding the bottom of the movable baffle is formed in the upper surface of the base plate seat, and a water stop is arranged in the groove.
Optionally, the bottom of the vacuum box is further connected with a water discharge box.
Optionally, the movable baffle is a stainless steel baffle.
Optionally, the top of the movable baffle is turned over outwards to form a plate edge, after the movable baffle is lifted, a supporting wood plate used for supporting the movable baffle is arranged between the plate edge and the top plate of the ring-type water tank.
Optionally, the drain board is a plastic drain board.
Optionally, a water filling port is arranged at the top of the ring-type water tank.
The utility model discloses for prior art gain following technological effect:
the utility model provides a device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state, when carrying out vacuum preloading, portable baffle inlays the base of soil sample case, and is sealed waterproof, when concreting and finishing, lifts portable baffle, and the water in the ring type water tank gets into the soil sample of cellular-type cask through the round hole; the method not only can ensure the completion of vacuum preloading and control the negative pressure state of the soil body, but also can calculate the horizontal permeability coefficient of the soil sample in real time through the reduction of the water level of the ring-type water tank. The utility model discloses the device is simple reasonable, and is easy and simple to handle, accords with the experimental needs of geotechnical engineering now, and the practicality is strong.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of the device for measuring horizontal permeability coefficient in an indoor simulated vacuum preloading state of the present invention in a vacuum preloading state;
fig. 2 is a schematic structural view of the device for measuring horizontal permeability coefficient in the indoor simulated vacuum preloading state of the utility model in the measuring state;
wherein the reference numerals are: 1. a soil sample barrel; 2. a vacuum box; 3. a vacuum pump; 4. a floor base; 5. a ring-type water tank; 6. a hole-type barrel; 7. soil sampling; 8. a movable baffle; 9. a drain plate; 10. a hose; 11. A vacuum gauge; 12. a groove; 13. a drain tank; 14. a plate edge; 15. supporting the wood board; 16. a water injection port.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The first embodiment is as follows:
as shown in fig. 1-2, the present embodiment provides an apparatus for measuring horizontal permeability coefficient under an indoor simulated vacuum preloading state, which includes a soil sample barrel 1, a vacuum box 2 and a vacuum pump 3 connected to the vacuum box 2; the soil sample barrel comprises a bottom plate seat 4, a ring-type water tank 5 fixed on the upper surface of the bottom plate seat 4 and a hole-type barrel 6 fixed inside the ring-type water tank 5, wherein the side wall of the hole-type barrel 6 is provided with a plurality of round holes, the hole-type barrel 6 is filled with soil samples 7, a movable baffle 8 is arranged between the ring-type water tank 5 and the hole-type barrel 6, and the movable baffle 8 is used for isolating the hole-type barrel 6 and the ring-type water tank 5 and can move up and down; when the bottom of the movable baffle 8 is connected with the bottom plate seat 4, water in the ring-type water tank 5 cannot enter the hole-type barrel 6, and when the movable baffle 8 is lifted until the bottom of the movable baffle 8 is separated from the bottom plate seat 4, the water in the ring-type water tank 5 can enter the hole-type barrel 6 sequentially through a gap between the movable baffle 8 and the bottom plate seat 4 and a circular hole; a drainage plate 9 is arranged in the hole type barrel 6, and the top end of the drainage plate 9 is connected with the vacuum box 2 through a hose 10.
In this embodiment, as shown in fig. 1 to 2, the upper surface of the hole-type barrel 6 is closed, and the aperture and pitch of the circular holes on the side wall should ensure that water in the ring-type water tank 6 can freely flow through the hole-type barrel; and the perforated drum 6 is preferably arranged coaxially with the ring tank 5. The top of the hole type barrel 6 is provided with a vacuum meter 11 which can measure the vacuum degree of the soil sample box 1, and the measuring range is preferably 0-120 KPa.
In the embodiment, the ring-type water tank 5 is preferably made of transparent organic glass and is bonded with the bottom plate seat 1; the surface of the ring-type water tank 5 is marked with scales, and the water level value can be read. Meanwhile, the volume of the ring-type water tank 5 is at least twice of that of the hole-type barrel 6, so that the water in the ring-type water tank 5 can completely act on the soil sample 7.
In this embodiment, as shown in fig. 1 to 2, the upper surface of the bottom plate seat 4 is provided with a groove 12 for embedding the bottom of the movable baffle 8, and a water stop is provided in the groove 12, so as to be capable of being combined with the movable baffle 8 to achieve the effect of sealing and stopping water.
In this embodiment, the bottom of the vacuum box 2 is further connected with a row of water tanks 13 through a connecting pipe, as shown in fig. 1-2, a switch valve is arranged on the connecting pipe. The vacuum box 2 is used for connecting the water drainage box 13, the vacuum pump 3 and the soil sample barrel 1 and is used for temporarily storing water; the bottom of the drain tank 13 is provided with a drain port for draining the temporarily stored water in the vacuum tank 2.
In this embodiment, the movable baffle 8 is preferably a stainless steel baffle, and has a cylindrical shape. As shown in fig. 1-2, the top of the movable baffle 8 is turned outwards to form a plate edge 14, and after the movable baffle 8 is lifted, a supporting wood plate 15 for supporting the movable baffle 8 is arranged between the plate edge 14 and the top plate of the ring-type water tank 5. According to the lifting height of the movable baffle 8, a supporting wood plate 15 with corresponding height is adopted to support below the plate edge 14 so as to keep the height of the movable baffle 8 constant.
In this embodiment, the drainage plate 9 is preferably a plastic drainage plate known in the art, the plastic drainage plate is flat, and the bottom end surface of the top of the hole-type barrel 6 is provided with a protrusion for clamping the plastic drainage plate, so that soil-like particles in the hole-type barrel 6 can be effectively prevented from being sucked into the vacuum box; the hose 10 penetrates through the top of the hole type barrel 6 and is connected with the plastic drainage plate in a sealing way. The structure and the drainage principle of the plastic drainage plate are not described herein again.
In this embodiment, as shown in fig. 1 to 2, a water injection port 16 is disposed at the top of the ring-type water tank 5, and water can be injected into the ring-type water tank 5 through the water injection port 16.
The concrete operation principle of this embodiment will be described below by taking the soil sample 7 as the blowing sludge as an example.
Firstly, carrying out vacuum pre-pressing consolidation on the blowing sludge in the hole type barrel 6, starting the vacuum pump 3 to extract water of a soil sample in the hole type barrel 6, embedding the movable baffle 8 into the groove 12 of the bottom plate seat 4, blocking water in the ring type water tank 5 from entering the blowing sludge, and when the vacuum degree in the hole type barrel 6 measured by the vacuum meter 11 reaches 100KPa (an example value), closing the vacuum pump 3 to finish the consolidation. After the solidification is finished, measuring the horizontal permeability coefficient of the blown sludge, pulling up the movable baffle 8 to a fixed position, placing a supporting wood plate 15 with corresponding height between the plate edge 14 and the top surface of the ring-type water tank 5 to support the movable baffle 8 and prevent the movable baffle 8 from sliding downwards, enabling water in the ring-type water tank 5 to enter a soil sample through a circular hole of the hole-type barrel 6, and calculating the horizontal permeability coefficient of the soil sample through the scale value of the water level reduction in the ring-type water tank 5. The calculation method of the horizontal permeability coefficient is the prior art, and is not described herein again.
Therefore, the device for measuring the horizontal permeability coefficient in the indoor simulation vacuum preloading state provided by the utility model has the advantages that when the vacuum preloading is carried out, the movable baffle is embedded into the base of the soil sample box, the sealing is watertight, after the consolidation is finished, the movable baffle is lifted upwards, and the water in the ring-type water tank enters the soil sample of the hole-type barrel through the round hole; the method not only can ensure the completion of vacuum preloading and control the negative pressure state of the soil body, but also can calculate the horizontal permeability coefficient of the soil sample in real time through the reduction of the water level of the ring-type water tank. The utility model discloses the device is simple reasonable, and is easy and simple to handle, accords with the experimental needs of geotechnical engineering now, and the practicality is strong.
It should be noted that, as is obvious to a person skilled in the art, the invention is not limited to details of the above-described exemplary embodiments, but can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The utility model discloses a concrete example is applied to explain the principle and the implementation mode of the utility model, and the explanation of the above example is only used to help understand the method and the core idea of the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (10)
1. The utility model provides a device of measuring horizontal permeability coefficient under indoor simulation vacuum preloading state which characterized in that: comprises a soil sample barrel, a vacuum box and a vacuum pump connected with the vacuum box; the soil sample barrel comprises a bottom plate seat, a ring-type water tank fixed on the upper surface of the bottom plate seat and a hole-type barrel fixed inside the ring-type water tank, wherein a plurality of round holes are formed in the side wall of the hole-type barrel, soil samples are filled in the hole-type barrel, a movable baffle is arranged between the ring-type water tank and the hole-type barrel, when the bottom of the movable baffle is connected with the bottom plate seat, water in the ring-type water tank cannot enter the hole-type barrel, the movable baffle is lifted until the bottom of the movable baffle is separated from the bottom plate seat, and the water in the ring-type water tank can enter the hole-type barrel through the round holes; and a drainage plate is arranged in the hole type barrel, and the top end of the drainage plate is connected with the vacuum box through a hose.
2. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: and a vacuum meter is arranged at the top of the hole type barrel.
3. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the ring-type water tank is a transparent organic glass water tank, and scales are carved on the surface of the ring-type water tank.
4. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the volume of the ring-type water tank is at least twice of that of the hole-type barrel.
5. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the upper surface of the bottom plate seat is provided with a groove used for embedding the bottom of the movable baffle, and a water stop is arranged in the groove.
6. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the bottom of the vacuum box is also connected with a water discharge tank.
7. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the movable baffle is a stainless steel baffle.
8. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the top of portable baffle turns over outwards to be formed with the board and follows, the back is mentioned to portable baffle, the board along with set up between the roof of ring type water tank and be used for supporting the support plank of portable baffle.
9. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: the drain board is a plastic drain board.
10. The apparatus for measuring horizontal permeability coefficient in indoor simulated vacuum preloading state according to claim 1, wherein: and a water filling port is arranged at the top of the ring-type water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294983.5U CN211472450U (en) | 2019-12-19 | 2019-12-19 | Device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922294983.5U CN211472450U (en) | 2019-12-19 | 2019-12-19 | Device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state |
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| Publication Number | Publication Date |
|---|---|
| CN211472450U true CN211472450U (en) | 2020-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922294983.5U Expired - Fee Related CN211472450U (en) | 2019-12-19 | 2019-12-19 | Device for measuring horizontal permeability coefficient under indoor simulation vacuum preloading state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183460A (en) * | 2022-12-21 | 2023-05-30 | 中山大学 | Roadbed filler permeability testing device and method |
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2019
- 2019-12-19 CN CN201922294983.5U patent/CN211472450U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116183460A (en) * | 2022-12-21 | 2023-05-30 | 中山大学 | Roadbed filler permeability testing device and method |
| CN116183460B (en) * | 2022-12-21 | 2024-03-15 | 中山大学 | Roadbed filler permeability testing device and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200911 Termination date: 20211219 |